A man walks up to a New Zealand sheep farmer and says, "If I can tell you exactly how many sheep you have down there, can I keep one?"
The farmer glances at the vast array of sheep, snickers, and says, "Sure."
The man looks carefully at the sheep, then says, "5,279."
The farmer, startled, says, "How did you do that?"
The man says, "I'd rather not say. Can I have my animal?"
"I guess so," says the farmer. The man picks up an animal and starts to walk away.
"Wait!" yells the farmer. "If I can guess where you're from, will you give me my animal back?"
The man snickers, and says, "Sure."
"You're from <ethnic origin>," says the farmer.
The man, startled, says, "How did you do that?"
The farmer says, "I'd rather not say. Can I have my dog back?"